diff --git a/HISTORY b/HISTORY
index 81ec61f..4e4b545 100755
--- a/HISTORY
+++ b/HISTORY
@@ -1,3 +1,6 @@
+May. 15 2017
+Added mb_get_gc_enabled and mb_set_gc_enabled functions
+
 May. 14 2017
 Added a clear_parser parameter to the mb_run function
 Added an extra end of running checking after stepped
diff --git a/MY-BASIC Quick Reference.pdf b/MY-BASIC Quick Reference.pdf
index 37b9d67..6b26099 100644
Binary files a/MY-BASIC Quick Reference.pdf and b/MY-BASIC Quick Reference.pdf differ
diff --git a/core/my_basic.c b/core/my_basic.c
index df6f99f..b26ff14 100755
--- a/core/my_basic.c
+++ b/core/my_basic.c
@@ -393,6 +393,7 @@ typedef struct _gc_t {
 	_ht_node_t* collected_table;
 	_ht_node_t* valid_table;
 	unsigned char collecting;
+	bool_t enabled_collecting;
 } _gc_t;
 
 typedef struct _calculation_operator_info_t {
@@ -6543,6 +6544,10 @@ static void _gc_collect_garbage(mb_interpreter_t* s, int depth) {
 
 	gc = &s->gc;
 
+	/* Check whether it's paused */
+	if(!gc->enabled_collecting)
+		return;
+
 	/* Avoid infinity loop */
 	if(gc->collecting)
 		return;
@@ -11300,6 +11305,7 @@ int mb_close(struct mb_interpreter_t** s) {
 	_tidy_scope_chain(*s);
 	_dispose_scope_chain(*s);
 
+	(*s)->gc.enabled_collecting = true;
 	_gc_collect_garbage(*s, -1);
 	_ht_destroy((*s)->gc.table);
 	_ht_destroy((*s)->gc.recursive_table);
@@ -13610,6 +13616,22 @@ _exit:
 	return result;
 }
 
+/* Get whether GC is enabled */
+bool_t mb_get_gc_enabled(struct mb_interpreter_t* s) {
+	if(!s) return false;
+
+	return s->gc.enabled_collecting;
+}
+
+/* Sets whether GC is enabled */
+int mb_set_gc_enabled(struct mb_interpreter_t* s, bool_t gc) {
+	if(!s) return MB_FUNC_ERR;
+
+	s->gc.enabled_collecting = gc;
+
+	return MB_FUNC_OK;
+}
+
 /* Trigger GC */
 int mb_gc(struct mb_interpreter_t* s, int_t* collected) {
 	int_t diff = 0;
diff --git a/core/my_basic.h b/core/my_basic.h
index a924785..ae2efe7 100755
--- a/core/my_basic.h
+++ b/core/my_basic.h
@@ -667,6 +667,8 @@ MBAPI int mb_set_error_handler(struct mb_interpreter_t* s, mb_error_handler_t h)
 MBAPI int mb_set_printer(struct mb_interpreter_t* s, mb_print_func_t p);
 MBAPI int mb_set_inputer(struct mb_interpreter_t* s, mb_input_func_t p);
 
+MBAPI bool_t mb_get_gc_enabled(struct mb_interpreter_t* s);
+MBAPI int mb_set_gc_enabled(struct mb_interpreter_t* s, bool_t gc);
 MBAPI int mb_gc(struct mb_interpreter_t* s, int_t* collected/* = NULL*/);
 MBAPI int mb_get_userdata(struct mb_interpreter_t* s, void** d);
 MBAPI int mb_set_userdata(struct mb_interpreter_t* s, void* d);